Titanium micro addition in a centrifugally cast HPNb alloy: High temperature mechanical properties

被引：25
作者：
Andrade, A. R. [1 ,2 ]
Bolfarini, C. [1 ]
Ferreira, L. A. M. [2 ]
Souza Filho, C. D. [2 ,3 ]
Bonazzi, L. H. C. [2 ,3 ]
机构：
[1] Univ Fed Sao Carlos, Dept Mat Engn, BR-13560 Sao Carlos, SP, Brazil
[2] ENGEMASA Engn & Mat Ltda, Dept Res & Dev, Sao Carlos, SP, Brazil
[3] Univ Sao Paulo, Dept Mat Engn, Sao Carlos, SP, Brazil
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 636卷
关键词：
Heat resistant alloy; High temperature mechanical properties; Centrifugal cast; HP alloy; Titanium addition; MICROSTRUCTURE;
D O I：
10.1016/j.msea.2015.03.085
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The influence of titanium micro addition on the mechanical properties at high temperature of HPNb alloy has been investigated. Two seamless tubes were centrifugally cast with a Ti micro addition being the major difference between them. Hot tensile and creep rupture tests were performed in the range of 900-1100 degrees C combining different strain rates and stresses, respectively. The Ti micro addition in the HPNb alloy decreases the mechanical resistance in the hot tensile tests, but increases considerably the time to rupture and ductility in creep properties. Solid solution, carbide formation and precipitation play important roles controlling these properties. A change in the fracture mode associated with a change in the creep mechanism was reported for both alloys. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：48 / 52
页数：5
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